// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/base/encryption_scheme.h"

namespace media {

EncryptionScheme::Pattern::Pattern() { }

EncryptionScheme::Pattern::Pattern(uint32_t encrypt_blocks,
    uint32_t skip_blocks)
    : encrypt_blocks_(encrypt_blocks)
    , skip_blocks_(skip_blocks)
{
}

EncryptionScheme::Pattern::~Pattern() { }

uint32_t EncryptionScheme::Pattern::encrypt_blocks() const
{
    return encrypt_blocks_;
}

uint32_t EncryptionScheme::Pattern::skip_blocks() const
{
    return skip_blocks_;
}

bool EncryptionScheme::Pattern::Matches(const Pattern& other) const
{
    return encrypt_blocks_ == other.encrypt_blocks() && skip_blocks_ == other.skip_blocks();
}

bool EncryptionScheme::Pattern::IsInEffect() const
{
    return encrypt_blocks_ != 0 && skip_blocks_ != 0;
}

EncryptionScheme::EncryptionScheme() { }

EncryptionScheme::EncryptionScheme(CipherMode mode, const Pattern& pattern)
    : mode_(mode)
    , pattern_(pattern)
{
}

EncryptionScheme::~EncryptionScheme() { }

bool EncryptionScheme::is_encrypted() const
{
    return mode_ != CIPHER_MODE_UNENCRYPTED;
}

EncryptionScheme::CipherMode EncryptionScheme::mode() const
{
    return mode_;
}

const EncryptionScheme::Pattern& EncryptionScheme::pattern() const
{
    return pattern_;
}

bool EncryptionScheme::Matches(const EncryptionScheme& other) const
{
    return mode_ == other.mode_ && pattern_.Matches(other.pattern_);
}

} // namespace media
